Cultivator.



C. D. ATKINSON. CULTIVATOR.

APPLIGATION man JAN. I9. 19x4.

1 1 62 5&4, Patented Nov. 30, 1915.

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COLUMBIA PLANOCIRAPH co..wAsmNnToN, n. c.

C. D. ATKINSON.

CULTIVATOR.

APPLICATION F ILED JAN. 19. I914.

Patented Nov. 30, 1915.

2 SHEETS-SHEET 2.

COLUMBLX PLANOGRAPH (Ia-WASHINGTON. D c.

CHRISTOPHER D. ATKINSON, OF UKIAH, CALIFORNIA.

GULTIVATOR.

Specification of Letters Patent.

Patented Nov. so, 1915.

Application filed January 19, 1914. Serial No. 813,148.

To all whom it may concern:

Be it known that I, CHRISTOPHER DEE ATKINSON, a citizen of the United States, residing at Ukiah, in the county of Mendocino and State of California, have invented certain new and useful Improvements in Cultivators, of which the following is a specification.

This inventioncomprehends certain new and useful improvements in cultivators and has for its primary object to generally improve and simplify the construction and op eration of devices of this character and increase the efliciency of the same.

A further object is to provide a device of this character with a special form of tooth mounted in tooth bars adapted to be turned to and held in various positions.

A further object .is to provide a device of this character in which the tooth bars are mounted in a vertically adjustable frame, by which is also carried means for turning the tooth bars to proper position and holding the same against movement during op eration of the implement.

A still further object is to provide a cultivator of this character with a special form of frame and novel means for adjusting the frame vertically and supporting the same in proper adjusted position.

Vith the above and other objects in View, my invention consists in certain novel constructions, combinations, and arrangements of parts to be hereinafter more fully described, claimed, and illustrated in the accompanying drawings, in which Figure l is a perspective view of the complete device; Fig. 2 is a detail longitudinal view through one of the corner posts and parts connected with the same; Fig. 3 is a transverse detail sectional view on the line 33 of Fig. 2; Fig. 4; is a fragmentary detail longitudinal section showing the manner in which the teeth are secured in the tooth carrying bars; Fig. 6 is a detail perspective view of a modified form of tooth; Fig. 5 is a detail sectional view on the line 55 of F ig. l; and Fig. 7 is a similar view of a still further modified form of tooth.

Referring more specifically to the drawings in which similar reference characters designate corresponding parts throughout the several views, 1 designates the teeth which are curved to substantially semi-circular form and have their lower ends ta-, pered to a point, as shown at 2, while the extension members 3 are formed at the upper ends of said teeth and extended upwardly at rightangles thereto. The purpose of the extension members 3 will presently appear. The teeth 1 are mounted in the tooth carrying bars 4:, said teeth being engaged through suitable openings 5 in said bars and being held in position by the substantially U shaped securing members 6, one leg of which is threaded and extended through the upper face of the bars 4, it being understood that the main portions of the U-shaped securing members are engaged around the portion of the teeth extended through the tooth carrying bars 4:, it further being understood that the bars l are formed of channel iron and that the extension members 3 bear against the outer face of themain or front wall of said tooth carrying bars 4. Nuts or the like 7 are positioned upon the extended threaded legs of the securing members 6.

The opposite ends of the tooth carrying bars 4 are closed and pivoted to the inner faces of the longitudinal frame members 8, by means of the pivot bolts 9. The longitudinal frame members 8 are connected at their front and rear ends by the transverse frame members 10 and the forward transverse frame member 10 is considerably shorter than the rear transverse frame member, thereby bringing the forward ends of the longitudinal frame members 8 closer together than the rear ends of said longitudinal frame members. The longitudinal frame members 8 are directed forwardly and parallel to one another for a slight distance from the rear transverse frame member 10, then directed inwardly toward one another for a short distance and again extended in parallel relation, and so on until the parallel forward ends of said longitudinal frame members are secured to the opposite ends of the forward transverse frame member 10. The frame members 8 and 10 form the frame-work within which are secured the tooth carrying bars 4 and other operative parts, said frame having hollow corner posts 11 projecting upwardly therefrom and within which are positioned rack bars 12, which will be later fully described.

The height of the frame may be readily adjusted by raising and lowering the hollow corner posts 11 upon the rack bars 12 by improved and novel means which will also be later fully described.

The forward rack bars 12 are secured at their lower ends to the rear ends of the rearwardly directed legs 13 of the lleshaped member 14 carrying the plate 15 within which the clevis 16 for carrying the doubletree 17, is secured. The rear end of the clevis 16 projects through the rear wall of the plate 15 and has its end bent back, as shown at 18, and engaged around the cable 19 which has its opposite ends secured to the front corners of the cultivator frame, as shown at 20. lhe clevis 16 is adjusted transversely of the implement and secured in proper position in the plate 15 by a'pair of removable pins 21 or the like engaged in suitable openings through the upper and lower Walls of the plate 15 and through the flat central portion of the clevis, as clearly shown in the drawing, it being understood that the plate 15 is bent centrally upon itself, thereby spacing the upper wall of said plate above the lower wall of the same.

The front wheels 22 of the implement are loosely mounted in the lower forked ends 23 of the bracket members 24, which have their upper or shank portions 25 rotatablyin their free vertical turned edges, the rear wheels being mounted in the lower forked ends 31 of said bracket members 24, thereby properly supporting the rear end of the frame of the cultivator in proper position above the surface to be worked.

Each hollow corner post 11 has a threesidedcasing 32 secured to one face, said face of the hollow corner post forming the forked side of the casing and having a vertical stop 33 the purpose of which will presently appear. A rod 34 is extended through the casings 32 secured to the corner post on one side of the implement while a similar rod 34 is secured through the casing 32 secured upon the remaining posts on the opposite side of the implement. One end of each rod 34 is bent to form a handle 35 and each of the rods 34 has a pinion 36 mounted thereon within each casing 32 through which the rod extends, said pinion being of such diameter as to project through the slot 33 and engage the teeth onthe rack'bar 12 within the corner post 11. It will therefore be seen that as each rod is rotated in one direction, the corner posts on that side of the implement will be caused to move upwardly upon their respective rack bars while a reverse rotation of said rod will cause the same corner posts to move downwardly upon their respective rack bars. The corner posts are retained in. adjusted positions upon their respective rack bars, by means of the latch members 37, theinner ends of which also project through the slots in the corner posts 11. and are engaged through the teeth of the liwk'bars within said corner posts, bymeans of the levers 38, through the lower ends of which said latch members 37 are secured. The lever 38 is in turn pivoted upon the pin 39 which extends transversely through the upper ends of the parallel upstanding ears 40 carried by the casing 32. The upper ends of the levers 38 are normally held away from the walls of the corner posts 11 by engagement, of said levers with the forked free ends of the spacing members 41 which are hinged to said walls of the corner posts 11 adjacent the upper ends thereof, as shown at 42,

whereby said levers 38 will serve to retain the latch members 37 in operative position. \Vhen the spacing members 41 are swung upon their hinges to allow the upper ends of the levers 88 to move toward the corner posts 11, thereby swinging said levers upon the pivot pins 89, the latch members 37 will be withdrawn from engagement with the rack bars 12 thereby allowing rotation of the rods 34 to raise or lower the frame, as desired.

Each tooth carrying bar 4 has an upwardly and rearwardly directed arm 43. The upper ends of the arms 43 are connected by the levers 44, which have their forward portions curved upwardly while their rear portions are extended in a substantially horizontal direction. An additional lever 44 is secured by its forward upwardly curved end to the upper end of'the arm 43 carried by the rear tooth carrying bar 4, the rear end of the lever 44 being pivoted to the straight operating lever 45 which is pivoted intermediate its ends to a supporting member 46 secured to the rear face of therear transverse frame member 10. By swinging the operating lever 45 in one direction, the tooth carrying bars 4 will be turned forwardly while movement of the lever 45 in the reverse direction will cause turning of the tooth carrying bar 4 in a rearward direction. The lever 46 may be readily lQcked in proper position by engage ment of the samewith the teeth of the rack 47, also secured to the supporting member 46, said rack being provided with a guide bar 48 in front of its teeth to prevent the lever 45 from being jolted away from the teeth of said rack. The lever 45 may be readily controlled bythe operator upon the seat 49 secured to the transverse frame member 10 by the seat supporting standard 50. The v l 4 may be ed i i x r me forward position by means of the latch bar 1 pivot d to't e' ov r nd of s id lever 4 nd ha ing'o f rw rd c n cut a a as shown at '52, whereby the forward end of said latch bar may be readily engaged with the upper edge of the rear transverse frame member 10 to prevent movement of the upper end of the lever 45 in a rearward direction.

It will be understood that each tooth 1 may be of the form shown in Fig. 4:, or in various other forms shown in Fig. 6, with the enlarged or thickened central portion 53, thereby providing a colter tooth or, if desired, each tooth 1 may have a moldboard 54 secured thereto, as shown at 55, said moldboard tapering toward its lower end,

as shown at 56. This last form is shown in Fig. 7. It will be understood, however, that I do not wish to limit myself to these specific forms of tooth, as various forms may be employed in connection with the other parts of this implement and difierent forms of moldboard and the like may be secured to any or all of the teeth, as desired.

The rearwardly directed legs 13 and the rearwardly directed bracket arms 27 Work between vertical guide strips 57 and 58, respectively, during vertical movement of the corner posts to which said legs and arms are connected, said guide strips 57 and 58 being positioned upon the sides of the corner posts to which the legs 13 and arms 17 extend.

While I have shown the preferred embodiment of my invention, it will be understood that minor changes in the details of construction and arrangement of parts may be made within the scope of the appended claims without departing from the spirit of my invention or sacrificing any of the advantages of the same.

What I claim is 1. In a machine of the character described, a supporting frame, ground treating implements connected therewith, tubular posts connected with the supporting frame near its corners, upstanding rack-bars mounted to reciprocate within the tubular posts, wheels connected with the rack-bars to support them, pinions connected with the posts and engaging the rack-bars, a rotatable shaft connected with each pair of pinions to turn them, means to rotate the shaft, a reciprocatory latch member arranged near each post and adapted for movement into and out of contact with the adjacent rackbar to lock it against movement, a support for the reciprocatory latch member connected with the post, and means to shift the latch member.

2. In a machine of the character described, a supporting frame, ground treating implements connected therewith, tubular posts se cured to the supporting frame, upstanding rack-bars mounted to slide within the tubular posts, wheels carried by the rack-bars to support them, a support secured to each tubular post, a pinion rotatably mounted upon each support and engaging the adjacent rack-bar, means to turn the pinion, a lever pivotally connected with the support, a reciprocatory latch member slidably mounted upon the support and connected with the lever to be moved thereby and adapted for movement into and out of engagement with the adjacent rack-bar to hold it against movement, and a pivoted member secured to the lever and adapted to be shifted to a position to contact with the adjacent tubular post for holding the lever against movement in one direction.

3. Inamachine of the character described, a supporting frame, ground treating implements connected therewith, tubular posts secured to the supporting frame near its corners, upstanding rack-bars slidably mounted within the tubular posts, a pinion box carried by each post, a pinion pivotally mounted within each pinion box and engaging the teeth of the adjacent rack-bar, a toothed reciprocatory latch member slidably mounted upon the top of each pinion box for movement into and out of engagement with the teeth of the rack-bar, an arm attached to the pinion box and extending upwardly therebeyond, a lever pivotally mounted upon the arm and pivotally connected with the latch member, a member pivotally connected with the lever above the pivot point of the lever and adapted to be moved into and out of contact with the adjacent tubular post, and means to turn the pinions.

CHRISTOPHER D. ATKINSON.

Witnesses:

BRENT A, LINDSAY, HARRY G. WOODHAM.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

